CONTENTS. 



The Forms of Leaves 160 



Compound Leaves ...,.. 168 



The Petiole or Leafstalk 171 



Phyllodia 172 



Ascidia, or Pitchers . . . . . . . 173 



Stipules . 174 



SECT. III. THEIR DEATH AND FALL; EXHALATION, ETC. . 175 



Duration of Leaves ....... 175 



Fall of the Leaf 176 



Death of the Leaf . 177 



Exhalation from the Leaves ...... 179 



Rise of the Sap 179 



CHAPTER VI. OF THE FOOD AND NUTRITION OF 



PLANTS 181 



SECT. I. THE GENERAL PHYSIOLOGY OF VEGETATION . 181 



SECT. II. THE FOOD AND ELEMENTARY COMPOSITION OF 



PLANTS 183 



SECT. III. ASSIMILATION, OR VEGETABLE DIGESTION, AND 



ITS RESULTS ...... 194 



CHAPTER VII. OF FLOWERING AND ITS CONSE- 

 QUENCES 209 



Flowering an Exhaustive Process ..... 209 



Evolution of Heat 4 211 



Plants need a Season of Rest ...... 213 



CHAPTER VIII. OF THE INFLORESCENCE . . 215 



Indefinite or Indeterminate Inflorescence .... 216 



Definite or Determinate Inflorescence .... 222 



CHAPTER IX. OF THE FLOWER ..... 227 



SECT. I. ITS ORGANS OR COMPONENT PARTS . . . 227 



SECT. II. ITS THEORETICAL STRUCTURE OR GENERAL MOR- 

 PHOLOGY ...... 230 



SECT. III. ITS SYMMETRY . 238 



Alternation of the Floral Organs .... 241 



Position as Respects the Axis and Bract .... 243 



SECT. IV. THE VARIOUS MODIFICATIONS OF THE FLOWER 244 



Augmentation of the Floral Circles 248 



Chorisis or Deduplication ...... 249 



